我正在寻找建议，以找出为什么启动需要超过 1 分钟。以及如何加快启动速度。
nuc:~$ systemd-analyze
Startup finished in 7.887s (firmware) + 6.265s (loader) + 7.309s (kernel) + 1min 6.801s (userspace) = 1min 28.263s
graphical.target reached after 1min 6.727s in userspace
nuc:~$ systemd-analyze critical-chain
graphical.target @1min 6.727s
└─multi-user.target @1min 6.727s
└─smbd.service @54.197s +4.149s
└─nmbd.service @44.066s +10.124s
└─network-online.target @43.929s
└─NetworkManager-wait-online.service @32.601s +11.326s
└─NetworkManager.service @25.057s +7.537s
└─dbus.service @25.052s
└─basic.target @24.994s
└─sockets.target @24.994s
└─snapd.socket @24.988s +4ms
└─sysinit.target @24.780s
└─systemd-timesyncd.service @24.562s +217ms
└─systemd-tmpfiles-setup.service @24.085s +458ms
└─systemd-journal-flush.service @4.517s +19.565s
└─systemd-remount-fs.service @4.290s +130ms
└─systemd-fsck-root.service @4.195s +92ms
└─systemd-journald.socket @4.102s
└─-.mount @4.090s
└─system.slice @4.090s
└─-.slice @4.090s
nuc:~$ systemd-analyze blame
33.123s plymouth-quit-wait.service
19.565s systemd-journal-flush.service
19.369s snapd.service
16.006s dev-sda3.device
13.470s udisks2.service
13.317s networkd-dispatcher.service
11.326s NetworkManager-wait-online.service
11.225s accounts-daemon.service
10.124s nmbd.service
7.716s polkit.service
7.565s dev-loop11.device
7.553s avahi-daemon.service
7.549s bluetooth.service
7.537s NetworkManager.service
7.303s dev-loop12.device
7.300s dev-loop14.device
6.816s dev-loop4.device
6.806s dev-loop3.device
6.806s dev-loop5.device
6.802s dev-loop2.device
6.798s dev-loop9.device
6.796s dev-loop13.device
6.794s dev-loop8.device
6.469s switcheroo-control.service
6.448s thermald.service
6.448s systemd-logind.service
6.432s wpa_supplicant.service
5.896s dev-loop7.device
5.649s dev-loop6.device
5.517s dev-loop10.device
5.219s dev-loop1.device
4.309s ModemManager.service
4.255s [email protected]
4.149s smbd.service
3.875s apport.service
3.548s systemd-resolved.service
3.499s gpu-manager.service
2.821s secureboot-db.service
2.712s fwupd.service
2.540s rsyslog.service
2.471s dev-loop0.device
2.204s gdm.service
1.713s ssh.service
1.618s systemd-udevd.service
1.614s grub-common.service
1.374s e2scrub_reap.service
1.239s upower.service
1.238s apparmor.service
1.200s snapd.seeded.service
1.175s systemd-rfkill.service
909ms snap-bare-5.mount
878ms snap-core18-2284.mount
867ms snap-core18-2344.mount
849ms snap-core20-1376.mount
836ms snap-core20-1405.mount
796ms grub-initrd-fallback.service
791ms snap-gnome\x2d3\x2d34\x2d1804-72.mount
740ms snap-gnome\x2d3\x2d34\x2d1804-77.mount
673ms systemd-modules-load.service
671ms snapd.apparmor.service
655ms systemd-backlight@backlight:acpi_video0.service
650ms systemd-user-sessions.service
640ms snap-gnome\x2d3\x2d38\x2d2004-87.mount
546ms keyboard-setup.service
539ms systemd-random-seed.service
516ms systemd-sysusers.service
513ms systemd-tmpfiles-setup-dev.service
493ms snap-gnome\x2d3\x2d38\x2d2004-99.mount
487ms systemd-udev-trigger.service
458ms systemd-tmpfiles-setup.service
436ms snap-gtk\x2dcommon\x2dthemes-1515.mount
433ms systemd-sysctl.service
398ms boot-efi.mount
366ms alsa-restore.service
356ms openvpn.service
351ms ir-keytable-load.service
295ms systemd-journald.service
282ms pppd-dns.service
247ms ufw.service
246ms snap-snapd-15177.mount
229ms systemd-tmpfiles-clean.service
228ms snap-gtk\x2dcommon\x2dthemes-1519.mount
217ms systemd-timesyncd.service
215ms plymouth-start.service
202ms home.mount
195ms [email protected]
192ms colord.service
185ms kerneloops.service
182ms snap-snap\x2dstore-547.mount
177ms dev-hugepages.mount
174ms dev-mqueue.mount
174ms snap-snapd-14978.mount
172ms sys-kernel-debug.mount
172ms sys-kernel-tracing.mount
170ms kmod-static-nodes.service
146ms snap-snap\x2dstore-558.mount
130ms systemd-remount-fs.service
95ms console-setup.service
92ms systemd-fsck-root.service
81ms [email protected]
78ms systemd-update-utmp.service
59ms setvtrgb.service
53ms rtkit-daemon.service
41ms finalrd.service
24ms systemd-update-utmp-runlevel.service
15ms sys-fs-fuse-connections.mount
15ms plymouth-read-write.service
12ms sys-kernel-config.mount
6ms systemd-fsck@dev-disk-by\x2duuid-8986\x2dED70.service
5ms systemd-fsck@dev-disk-by\x2duuid-4daa739b\x2df12b\x2d48f5\x2db0e0\x2dd8dbf417237c.service
5ms nordvpnd.socket
4ms snapd.socket
编辑 1：关键链显示 smbd 和 nmbd 耗时。禁用后差别不大。然后 snapd 开始运行。